Martin,Belarus has only ever issued medal-coins.The Belarusian Rubel is entirely a note-based circulating currency.Cambodia last issued coins in 1994,but they were withdrawn after a short period.
Since 2003,the Zimbabwean currency has been an entirely note-based currency.In 2006,there were Bearer Cheques issued for denominations as low as 1 Cent,but these disappeared from circulation straight away.The highest denominated Bearer Cheque is the $10,000,000 denomination,which is still worth nothing in real terms,but there are avid collectors of the Zimbabwean banknote series,like myself.
Aidan.